Do honest test coverage analysis in Jenkins

osutil/osutil_test.go

@@ -0,0 +1,7 @@
+// Copyright (C) 2014 Jakob Borg and Contributors (see the CONTRIBUTORS file).
+// All rights reserved. Use of this source code is governed by an MIT-style
+// license that can be found in the LICENSE file.
+
+package osutil_test
+
+// Empty test file to generate 0% coverage rather than no coverage